JP2011069068A - Base isolating and seismic response control structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an effective, appropriate base isolating and seismic response control structure which effectively absorbs seismic energy and exhibits excellent base isolating and seismic response control effects. <P>SOLUTION: A high-rise or super high-rise building is constructed of an annular body 3 in a plan view formed of a tube frame, and a core 2 constructed at the center independently of the body. A clearance for permitting horizontal relative vibration is secured between the body and the core. The body is installed on a foundation structure made of a foundation bottom slab 1 or the like while being supported in a base isolating manner by a bottom base isolating apparatus 5. The core is made relatively higher in rigidity than the body and installed in a self-supported state while being rigidly connected to the foundation structure. A top base isolating apparatus 6 is interposed between the top of the core and the body. Intermediate base isolating and seismic response control apparatus 7 supporting the body by the core and operated by horizontal relative vibration generated between them are interposed at spaces in multiple stages between the core and the intermediate parts in the height direction of the body. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a seismic isolation / seismic combined structure for high-rise or super-high-rise buildings, that is, a seismic isolation structure.

  As is well known, the seismic isolation structure is designed to reduce the input of seismic energy to the building by separating the ground and the building by supporting the building with a seismic isolation device such as laminated rubber. Is to install a vibration control device (damper) in the building to absorb the seismic energy and reduce the vibration response.

  In addition, as shown in Patent Document 1, a proposal has been made for a seismic isolation / seismic combined structure (base isolation structure) that uses both a base isolation structure and a vibration control structure to exhibit both the base isolation function and the vibration control function. ing.

Japanese Patent Laid-Open No. 11-241524

In conventional seismic isolation structures and seismic isolation structures, seismic energy is installed on the base of the building (in the case of basic seismic isolation) or the middle floor in the lower part (in the case of intermediate floor seismic isolation), so the seismic energy Cannot be absorbed efficiently.
In other words, in general, the interlaminar shear deformation angle is larger in the middle floor than in the lower and upper floors. Since energy is absorbed, efficient energy absorption corresponding to the distribution of the interlaminar shear deformation angle from the middle floor to the upper floor cannot be performed.

  In addition, in the conventional seismic isolation structure, the pulling force due to the overturning moment acts on the seismic isolation device, so the seismic isolation device needs to be resistant to it, and a fail-safe mechanism is also required to prevent accidental overturning Therefore, it is necessary to sufficiently strengthen the columns and beams in order to suppress the floating and deformation of the entire building.

  In view of the above circumstances, an object of the present invention is to provide an effective and appropriate seismic isolation structure capable of effectively absorbing seismic energy and exhibiting an excellent seismic isolation effect and damping effect.

  The present invention is a seismic isolation structure for a high-rise or super-high-rise building, the main body portion in a plan view with a tube frame and the core portion that is constructed at the center position independently of the main body portion. To secure clearance to allow horizontal relative vibration between the main body part and the core part, and the main body part is installed on the foundation structure with seismic isolation support by the bottom seismic isolation device The core portion is relatively rigid than the main body portion and is rigidly connected to the foundation structure and installed in a self-supporting state, and a top seismic isolation device is provided between the top portion of the core portion and the main body portion. A horizontal direction generated between the main body portion and the core portion while the intermediate portion of the main body portion is supported by the core portion between the intermediate portion in the height direction of the main body portion and the core portion. Up and down the middle seismic isolation device that operates by relative vibration of Spaced direction and characterized by being interposed in multiple stages.

According to the present invention, since the main body is installed with the base isolation device being isolated from the base, not only an excellent seismic isolation effect is obtained on the main body in the same manner as a normal seismic isolation structure, but also the main body. Since the main unit is isolated from the top by a top seismic isolation device installed between the top of the core unit and the main unit, which is built independently from the unit, both the main unit and the core unit are overturned and bent. Deformation can be effectively suppressed.
In addition, since the relative vibration in the horizontal direction between the main body and the core is allowed within the clearance range, and the intermediate part seismic isolation device is provided in multiple stages between them, the intermediate part of the main body also The intermediate part seismic isolation device is supported by the core part to effectively restrain overturn and roll during earthquakes and strong winds, and in that case the intermediate part seismic isolation device operates efficiently. Effectively absorbs seismic energy and obtains excellent seismic control effect.

It is a schematic diagram which shows the basic composition of the seismic isolation structure of this invention. It is an elevation sectional view showing the example of the building by the seismic isolation structure of the present invention. It is a top view of a bottom part same as the above. It is a top view of the same as the above. It is a top view of an intermediate part. It is a figure which shows the other specific example same as the above. It is a figure which shows another specific example same as the above. It is a schematic diagram which shows the other basic composition of the seismic isolation structure of this invention.

  The basic configuration of the seismic isolation structure of the present invention will be described with reference to FIG. FIG. 1 schematically shows a vertical section of a high-rise or super-high-rise building with the seismic isolation structure of the present invention. Reference numeral 1 is a foundation bottom, 1a is a pile, 2 is rigidly connected to the foundation bottom 1, and is self-supporting. The core part 3 constructed in (1) is an annular main body part surrounding the core part 2 and constructed around it.

  The core portion 2 is a high-rigidity structure constructed by a core wall or truss structure, and a high-rigidity top structure 2a such as a hat truss protruding above the main body 3 is integrally formed on the top portion. Is provided. The interior of the core part 2 can be used as an installation space for shared facilities such as elevators and stairs, or can be used as an installation space for tower parking.

The main body 3 is structurally constructed independently of the core and is the main living space of this building. The outer tube frame and the inner tube frame are connected by beams on each floor. An annular tube structure surrounding the core portion 2 is formed.
The main body 3 is structurally relatively low in rigidity compared to the core 2 (in other words, the core 2 is higher in rigidity than the main body 3). And the core part 2 exhibit different vibration characteristics. In the event of an earthquake, horizontal relative vibration occurs between them, and a clearance 4 for allowing the relative vibration is provided between the core part 2 and the main body. It is secured over the entire circumference between the part 3.
In addition, the core part 2 is installed in a self-supporting state in a state of being rigidly connected to the foundation bottom board 1, but the entire body part 3 is seismically isolated by a bottom part seismic isolation device 5 such as laminated rubber on the foundation bottom board 1. A top seismic isolation device 6 such as a laminated rubber is also interposed between the top of the main body 3 and the top structure 2a of the core 2.

  As a result, the upper and lower parts of the main body part 3 are supported by the base isolation device 6 and the base isolation device 5, and the entire main body part 3 is in a horizontal direction with respect to the core part 2 in the event of an earthquake. Horizontal displacement such as sliding, or bending deformation in which the main body 3 bends laterally as shown in the figure between the upper and lower support points, and horizontal vibration due to this is allowed within the above clearance 4 range. It has come to be.

A plurality of intermediate seismic isolation devices 7 are interposed in multiple stages (six stages in the figure) between the core part 2 and the intermediate part in the height direction of the main body part 3. These parts are also supported by the core part 2 via the intermediate part seismic isolation device 7 so that the fall and roll are effectively restrained during an earthquake or strong wind, and the main body part 3 and the core part 2 are also restrained. When the relative vibrations in the horizontal direction as described above are generated between them, the intermediate seismic isolation device 7 operates to efficiently absorb the seismic energy.
Various dampers such as oil dampers, high-damping viscoelastic dampers, laminated rubber containing lead plugs, and the like can be suitably used as the intermediate part seismic isolation device 7.

  According to the above-described seismic isolation structure, basically, the entire main body 3 is seismically isolated and supported by the bottom seismic isolation device 5 as in a normal seismic isolation structure. A seismic effect is obtained.

  Moreover, it is a structure which presses down the main-body part 3 also from the top by supporting the top part of the main-body part 3 from the top part of the core part 2 constructed | assembled independently from the main-body part 3 via the top-part seismic isolation device 6. Furthermore, since the intermediate part of the main body part 3 is also supported by the core part 2 via the multi-stage intermediate part seismic isolation device 7, the overturning moment acting on both the main body part 3 and the core part 2 is not affected by the bottom base isolation device. 5. They are transmitted to each other via the top seismic isolation device 6 and the intermediate seismic isolation device 7 so that they support each other and are difficult to fall over by themselves, so that the entire building is sufficiently stable. It is also possible to omit or reduce the pull-out strength against the bottom seismic isolation device 5 and the fail-safe mechanism for preventing overturning due to the structure.

In addition, the main body 3 generates horizontal relative vibration with respect to the core 2 within the clearance 4, and the intermediate vibration isolation device 7 is activated by the relative vibration to efficiently absorb the seismic energy. The seismic input to the main body 3 is reduced, and an excellent seismic control effect is obtained.
In this case, since the middle part seismic isolation devices 7 are installed in the middle floor area where the interlaminar shear deformation angle is large, the middle part seismic isolation devices 7 are installed on the lower and upper floors. The seismic energy can be sufficiently absorbed by operating more efficiently than the above, and as a result, the required cross section of the housing can be sufficiently reduced by minimizing the seismic force on the main body 3.

  In addition, it is assumed that bending deformation that causes the core portion 2 to vibrate like an inverted pendulum occurs during an earthquake, but such bending deformation of the core portion 2 is caused from the main body portion 3 via the top seismic isolation device 6. It is sufficiently restrained by receiving the reaction force in the vertical direction.

2 to 5 show specific design examples of buildings by the seismic isolation structure of the present invention.
The main body 3 is composed of a double tube frame in which an outer tube frame 10 and an inner tube frame 11 are connected by a connecting beam 12 on each floor, and a corridor 13 is provided over the entire circumference inside the inner tube frame 11. A clearance 4 is secured between the core portion 2 and the inside.
The core portion 2 is constituted by a highly rigid core wall or truss structure body, and a top structure 2a provided integrally on the top portion of the core portion 2 is a high-rigidity large-section hat truss that projects above the main body portion 3. .

Then, as shown in FIG. 3, the base part 3 is installed between the bottom part of the main body part 3 (the bottom part of the outer tube structure 10 and the inner tube structure 11) and the base bottom plate 1 with the bottom seismic isolation device 5 interposed therebetween. As shown in FIG. 4, the structure is supported between the top of the main body 3 (the top of the outer peripheral tube frame 10 and the inner peripheral tube frame 11) and the top structure 2 a of the core 2. The body 6 is interposed.
Moreover, the intermediate part seismic isolation device 7 is installed in the intermediate part of the main-body part 3 every several floors (every 5th floor in the example of illustration). As shown in FIG. 5B, the intermediate seismic isolation device 7 includes the inner peripheral tube frame 11 and the core part 2 at the four corners of the inner peripheral tube frame 11 and the core part 2 as shown in FIG. Are installed between the installation bases 14 and 15 provided on both sides of the main body 3 so that the main body 3 is disposed on the ceiling part of the corridor 13. 15, and is supported by the core portion 2.

  FIG. 6 shows another design example. In this configuration, the length of the top structure 2 a of the core portion 2 projecting upward from the main body 3 is reduced, and the top seismic isolation device 6 is installed only between the top portion of the inner peripheral tube frame 11. In this case, the same effect can be obtained by supporting the main body 3 from above with a smaller number of top seismic isolation devices 6 than in the case of the above design example.

  FIG. 7 shows still another design example. This is because the core part 2 does not reach the top of the building but the upper part is a void space 16, and the installation table 17 provided on the top of the core part 2 and the four corners inside the inner peripheral tube frame 11 are provided. The top seismic isolation device 6 is interposed between the overhanging installation base 18 and the same effect can be obtained by this.

  The present invention is not limited to the form of basic seismic isolation as in each of the above design examples, but as shown in FIG. It is also possible to adopt the form.

1 Foundation floor (foundation structure)
DESCRIPTION OF SYMBOLS 1a Pile 2 Core part 2a Top structure 3 Main part 4 Clearance 5 Bottom seismic isolation device 6 Top seismic isolation device 7 Middle part seismic isolation device 10 Peripheral tube frame 11 Inner circumference tube frame 12 Connecting beam 13 Corridors 14, 15 Installation stand 16 Void space 17, 18 Installation stand 20 Low-rise building

Claims (1)

A seismic isolation structure for high-rise or super-high-rise buildings,
The building is composed of a tube-shaped main body portion in a plan view and a core portion that is constructed at the center of the main body portion independently of the main body portion, and the horizontal relative vibration is generated between the main body portion and the core portion. Ensure clearance to allow,
The main body is installed on the foundation structure with seismic isolation support by a bottom seismic isolation device,
The core part is relatively rigid than the main body part and is rigidly connected to the foundation structure and installed in a self-supporting state, and a top seismic isolation device is interposed between the top part of the core part and the main body part. Dress
The intermediate portion of the main body portion is supported by the core portion between the height direction intermediate portion of the main body portion and the core portion, and is operated by horizontal relative vibration generated between the main body portion and the core portion. A seismic isolation system characterized in that intermediate seismic isolation devices are arranged in multiple stages at intervals in the vertical direction.

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